Goal 11: Sustainable cities and communities
As many households relocate from rural areas into Yemeni cities, government and communities have struggled to accommodate rapid population growth. Conflict has damaged or destroyed infrastructure which, in the absence of regular investment and maintenance, has continued to deteriorate. Many are relegated to living in slums or informal settlements that are not connected to any of the basic services and are prone to become concentration of poverty and crime.
Making cities safe and sustainable means ensuring access to safe and affordable housing and upgrading slum settlements. It also involves investment in public transport, creating green public spaces, and improving urban planning and management in a way that is both participatory and inclusive. Sustainable development can only be achieved by transforming the way we build and manage our urban spaces.
In 2018, 4.2 billion people, 55 percent of the world’s population, lived in cities. By 2050, the urban population is expected to reach 6.5 billion.
Cities occupy just 3 percent of the Earth’s land but account for 60 to 80 percent of energy consumption and at least 70 percent of carbon emissions.
828 million people are estimated to live in slums, and the number is rising.
In 1990, there were 10 cities with 10 million people or more; by 2014, the number of mega-cities rose to 28, and was expected to reach 33 by 2018. In the future, 9 out of 10 mega-cities will be in the developing world.
In the coming decades, 90 percent of urban expansion will be in the developing world.
The economic role of cities is significant. They generate about 80 percent of the global GDP.